Bs.tong hop li thuyet 12. thay tung (2)

1. 2014 : : .. 2. STT Trang 1 3 2 17 3 24 4 34 5 Sng nh sng 38 6 43 7 49 3. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 3 . a: l da 2 2 f T t N T f N t 3. Phng trnh d a : x = Acos(t + ) A O A x A = xmax t + ): : = 0. = . = /2. = /2. Ch : cos sin sin cos 2 2 4. Phng tr v = Asin(t + ) |v|max = A |v|min = 0 v A O A x |v|min |v|max |v|min 5. Phng tr 2Acos(t + ) = -2x |v|max = A; |a|min |v|min = 0; |a|max = 2A a A O A x |a|max |a|min |a|max Fhpmax Fhpmin 4. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 4 A O A x(cos) A O xM A x(cos) M . t Ch : 1 2. x1 v x2 .T t 2 A O A x(cos) A O A x(cos) M x1 x2 2 2 2 2 2 2 2 2 2 max2 4 2 2 2 2 2 max max v a v a A x A v v a a x v= A x v 5. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 5 0 . k k k 0 th c t1 = k.T 2 t = t1 + t2 n1) + 1 n1 0 th c t1 = (n1).T 2 t = t1 + t2 t Tm t = t2 t1. A O A x(cos) M x1 x2 .2k S = k.4A + S0 Tm S0 1. 0. 0S max/Smin t ( t < T/2) maxS 2Asin 2 A O A x(cos) M minS A O A x(cos) M maxS minS 2A 1 cos 2 6. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 6 max/Smin t (T/2< max minS 2A 2Asin S 2A 2A 1 cos 2 2 S v t max2v4A v T tb x v t x tb = 0 0 t .2k k.2 0 k. t. = . t Tch gc qut: 0 .2k k.2 0 k t. = . t 7. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 7 1. Phng trnh dao : x = Acos(t + ) : 2m (N/m) mg l k k m 1 k T 2 f m k 2 m 2 21 1 1 2 1 2 T mN k T N m k 1 c chu k T1; m1 c chu k T1; m = m1 + m2 c chu k T: 2 2 2 1 2T T T 1 c chu k T1; m1 c chu k T1; m = m1 m2 1 > m2)2 2 2 1 2T T T 1, k2 l1; l2 th c: 1 1 2 2k.l k l k l ... l0, k0 l1, k1 l2, k2 l3, k3 GHP L XO nt 1 2 1 1 1 k k k ss 1 2k k k 2 2 2 nt 1 2T T T 2 2 2 ss 1 2 1 1 1 T T T Fhp = kx = (Fhpmin = 0; Fhpmax = kA) khng 8. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 8 hmax hminF kA F 0 hF kx k x 0l l x A O A x = l hF k. x hmaxF k.( l A) hminF 0 l A hminF k( l A) l A nnF k(A l) max min cb 0 l l l l l 2 lmax = lcb + A min = lcb A mg l k a. Khi A > l0 ( ): b. Khi A < l0 ( ): nn 2 t tgin = T tnn l cos A 0l maxx l A O VTCB A O A x(cos) A O A x(cos) l l. tnn = T Tgin 9. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 9 2 2 2 2 2 2 t 1 1 1 W kx m x m A cos ( t ) 2 2 2 2 2 2 2 1 1 W mv m A sin ( t ) 2 2 2 2 2 2 2 t hpmax 1 1 1 1 1 W W W kx mv kA m A F .A 2 2 2 2 2 Khi vmax th W ; khi xmax th Wtmax T t 4 A 2 x 2 T' = 0,5T v f' = 2f. khn khng l T/2 Khi: t A W nW x n 1 Khi: t A W nW v n 1 v A : max max 2 2 a v2 k g v a 2 f T m l x A AA x A = xmax 2 2 2 2 2 4 2 v a v A x max min max cb cb min L LL A L L L L 2 2 2W A k max maxtb 2 v av .T A 4 0 0 x Acos t 0 ... v A sin 10. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 10 n g 1 g T 2 f g 2 l; g l v g; khng m. 2. Phng trnh dao 0 T oC; oC Lm ion ha khng kh ion ha khng kh. bo. my bay. 1011m 108m 0,38 m 0,76 m 103m 43. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 43 0) 0 0 bh2I bh1I 1U I UhU O Khi UAK < Uh 0max catot (do Uh Khi UAK AK 1 AK bh bh 8 44. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 44 Cng thot 0 hc A 0 v0max f, : 2 0max hc 1 hf A mv 2 2 h 0max 1 e.U mv 2 2 2 0max AK 1 1 mv e.U mv 2 2 2 2 max max max 0 0 1 1 W mv e U mv 2 2 min max hc W Umax vmax catot. v0 0 = 0) m = 9,1.10-31 2 max 0max max 1 e V mv e .E.d 2 U E d Vmax dmax p P n .t bh e I n e e p n H .100 n 45. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 45 B em v R e Bsin = ( , ) 0max v B Khi sin = 1v B e 0maxm v R e B 0 0 Khc nhau : Ch : : trong cc my o nh sng. g nh thnh 46. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 46 Ln quang kch thch < pht quang) kt pq kt pq kt pq hc hc 1 1 hf hf hc kt kt kt pq pq pq P n . H .100% .100% P n . 9. Laser 47. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 47 9. Laser . . 2 n 0r n .r 0 = 5,3.1011 m rn r0 n 1 2 3 4 5 6 Tn K L M N O P rn r0 4r0 9r0 16r0 25r0 36r0 Em En mn m n mn m nE E Em En mn n m En m m n mnE E 48. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 48 n 2 13,6 eV E n = 0 3 1 3 2 2 1 31 32 21f f f 31 32 21 1 1 1 Dy Lai-man Dy Ban-me Dy Pa-sen Dy Lai-man: Dy Ban-me: Dy Pa-sen: HHHH ), Lam (H ), Chm (H ), Tm (H ) 1 2 3 4 5 6 K L M N O P 49. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 49 A Z X 1 2 2 3 3 1 1 1 1 1H; H( D); H( T) 12 6C 1u = 27 13 23 2 A 1 12 1 12 MeV . (g) . g 1,66055.10 kg 931,5 ; 1MeV=1,6.10 (J) 12 N 12 6,02.10 c 2 2 E E mc m c 0 0 2 2 m m v 1 c m0 c tng tc gi , bn knh tng tc kho 15m. c tng tc m . A Z X mhn (mX) Z.mp (A Z).mn lk khng p n hnm Z.m (A Z).m m 2 2 lk p n hnW m.c Z.m (A Z).m m .c 50. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 50 0 A B C D m m m m m m 2 2 trc sau 0E (m m ).c (m m).c 2 lksau lktrcE (W W ).c 2 sau trcE (K K ).c E > 0 E < 0 thu n t n 4 2He Z 4 A 4 A 2 Z 2X He Y 0 1e Z 0 A A 1 Z 1X e Y + 0 1e Z 0 A A 1 Z 1X e Y Z 0 Z A 0 AX X 7 m/s + 11 51. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 51 i gian t l n ln2 T Trong qu trnh phn r, Trong qu trnh phn r, i l i l ng c trng cho tnh phng x N0 Nt m0 mt H0 Ht 1 Bq = 1 phn r/giy 1Ci = 3,7.1010 Bq N H t t0 t 0t T N N N .e 2 t0 t 0t T m m m .e 2 t0 t 0t T H H H .e ; H .N 2 PHNG PHP nh d m c, b nh ung th Xc 52. 0975.111.365 | Facebook: www.facebook.com/thaytung.vatli Trang 52 U-235 Ce-140 Rb-93 n n nn 3,2.10-11 J 53. https://www.facebook.com/thaytung.vatli Fanpage: https://www.facebook.com/LuyenthiDaihocSieuViet 54. https://www.facebook.com/thaytung.vatli